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BioReagent 级 ,适用于对基线干扰要求严格的色谱和分析工作流程。
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在色谱分析、有机合成和交叉偶联反应领域已被 0 篇同行评审文献引用。
CTX-1,也被称为1型胶原蛋白的羧基末端交联端肽或I型胶原蛋白端肽的C端,是骨质疏松和骨吸收的标志物。它是一种常见的骨转换标志物(BTM),可以很容易地在血浆、血清或尿液中测量。骨质周转是指通过吸收去除旧骨,然后生成新骨。CTX-1通过cathepsin K裂解从完整的1型胶原蛋白中释放出来,可以通过针对八个氨基酸序列EKAHDGGR的抗体来检测。它的水平显示出因食物摄入而改变的昼夜节律变化,这使得样本采集的时间成为一个重要的考虑因素,通常是在空腹状态下进行。研究显示,CTX-1和骨特异性碱性磷酸酶(BSALP)水平的增加与骨折和骨质疏松症的风险增加有关。 本试剂盒采用竞争法酶联免疫吸附试验(ELISA)。往预先包被有人Ⅰ型胶原交联羧基端肽(CTXⅠ)抗原的微孔中,依次加入样本、标准品、Biotin标记的抗体,HRP酶结合物,中间经过温育和洗涤,用底物TMB显色,TMB在过氧化物酶(HRP)的催化下转化成蓝色,并在酸的作用下转化成最终的黄色。颜色的深浅和样本中的人Ⅰ型胶原交联羧基端肽(CTXⅠ)呈负相关。用酶标仪在450nm波长下测定吸光度(OD值),计算样本浓度。
This kit employs the competitive enzyme-linked immunosorbent assay (ELISA) principle. Microplate wells are pre-coated with Human CTXⅠ antigen. The sample, standards, a biotin-labeled antibody, and an HRP enzyme conjugate are then added sequentially to the wells. The procedure includes incubation and wash steps between each addition. TMB substrate is used for color development. In the presence of the peroxidase (HRP) enzyme, TMB is catalyzed to produce a blue color, which is then converted into a final stable yellow color upon the addition of an acid stop solution. The intensity of the resulting yellow color is inversely proportional to the concentration of Human CTXⅠ in the sample. The optical density (OD) is measured at a wavelength of 450 nm using a microplate reader, and the concentration of the target analyte in the sample is calculated based on the standard curve.